Q. What is the minimum value of the function f(x) = x^4 - 8x^2 + 16?
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Solution
f'(x) = 4x^3 - 16x. Setting f'(x) = 0 gives x(x^2 - 4) = 0, so x = 0, 2, -2. f(0) = 16, f(2) = 0, f(-2) = 0. Minimum value is 0.
Correct Answer: A — 0
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Q. What is the mode of the data set: 1, 2, 2, 3, 4, 4, 4, 5?
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Solution
The mode is the number that appears most frequently, which is 4.
Correct Answer: D — 4
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Q. What is the mode of the data set: 1, 2, 2, 3, 4?
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Solution
Mode is the number that appears most frequently. Here, mode = 2.
Correct Answer: B — 2
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Q. What is the mode of the data set: 5, 1, 2, 5, 3, 5, 4?
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Solution
Mode is the number that appears most frequently. Here, mode = 5.
Correct Answer: C — 5
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Q. What is the mode of the following data set: 1, 1, 2, 3, 3, 3, 4, 5?
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Solution
Mode = 3 (most frequent value).
Correct Answer: C — 3
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Q. What is the mode of the following data set: 1, 2, 2, 3, 4, 4, 4, 5?
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Solution
The mode is 4 as it appears most frequently (3 times).
Correct Answer: C — 4
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Q. What is the mode of the following data set: 1, 2, 2, 3, 4?
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Solution
Mode is the number that appears most frequently. Here, mode = 2.
Correct Answer: B — 2
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Q. What is the mode of the following data set: {1, 1, 2, 2, 3, 3, 3, 4}?
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Solution
Mode is 3 as it appears most frequently (3 times).
Correct Answer: C — 3
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Q. What is the modulus of the complex number z = -3 + 4i?
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Solution
The modulus |z| = √((-3)^2 + (4)^2) = √(9 + 16) = √25 = 5.
Correct Answer: A — 5
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Q. What is the number of proper subsets of the set E = {a, b}?
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Solution
The total number of subsets is 2^n = 2^2 = 4. Proper subsets exclude the set itself, so there are 4 - 1 = 3 proper subsets.
Correct Answer: B — 3
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Q. What is the number of subsets of the empty set?
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Solution
The empty set has exactly one subset, which is itself (∅).
Correct Answer: B — 1
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Q. What is the number of subsets of the set F = {x, y, z}?
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Solution
The number of subsets of a set with n elements is 2^n. Here, n = 3, so 2^3 = 8.
Correct Answer: D — 8
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Q. What is the number of subsets of the set H = {1, 2, 3, 4, 5}?
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Solution
The number of subsets of a set with n elements is 2^n. Here, n = 5, so 2^5 = 32.
Correct Answer: A — 32
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Q. What is the number of subsets of the set H = {x, y, z, w, v}?
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Solution
The number of subsets of a set with n elements is 2^n. Here, n = 5, so the number of subsets is 2^5 = 32.
Correct Answer: A — 32
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Q. What is the number of subsets of the set {1, 2, 3, 4}?
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Solution
The number of subsets of a set with n elements is 2^n. Here, n = 4, so the number of subsets is 2^4 = 16.
Correct Answer: C — 16
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Q. What is the number of subsets of the set {a, b, c, d}?
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Solution
The number of subsets of a set with n elements is 2^n. Here, n = 4, so the number of subsets is 2^4 = 16.
Correct Answer: B — 8
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Q. What is the particular solution of dy/dx = 4x with the initial condition y(0) = 1?
A.
y = 2x^2 + 1
B.
y = 4x^2 + 1
C.
y = 2x^2
D.
y = 4x^2 + C
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Solution
Integrating gives y = 2x^2 + C. Using the initial condition, C = 1.
Correct Answer: A — y = 2x^2 + 1
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Q. What is the particular solution of the equation dy/dx = 2y with the initial condition y(0) = 1?
A.
y = e^(2x)
B.
y = e^(2x) + 1
C.
y = 1 + e^(2x)
D.
y = 1 + 2x
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Solution
The general solution is y = Ce^(2x). Using the initial condition y(0) = 1, we find C = 1.
Correct Answer: A — y = e^(2x)
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Q. What is the particular solution of the equation dy/dx = 2y with y(0) = 5?
A.
y = 5e^(2x)
B.
y = 2e^(2x)
C.
y = 5e^(-2x)
D.
y = 5 + 2x
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Solution
The general solution is y = Ce^(2x). Using y(0) = 5 gives C = 5.
Correct Answer: A — y = 5e^(2x)
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Q. What is the power set of A = {a, b}?
A.
{∅, {a}, {b}, {a, b}}
B.
{a, b}
C.
{∅, {a, b}}
D.
{a, b, {a, b}}
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Solution
The power set of a set is the set of all its subsets. For A = {a, b}, the power set is {∅, {a}, {b}, {a, b}}.
Correct Answer: A — {∅, {a}, {b}, {a, b}}
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Q. What is the power set of the empty set ∅?
A.
{∅}
B.
{∅, {∅}}
C.
∅
D.
{∅, ∅}
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Solution
The power set of the empty set contains only the empty set itself: {∅}.
Correct Answer: A — {∅}
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Q. What is the power set of the set F = {a}?
A.
{∅, {a}}
B.
{∅, a}
C.
{a}
D.
{∅}
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Solution
The power set of F = {a} is {∅, {a}}.
Correct Answer: A — {∅, {a}}
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Q. What is the power set of the set G = {1}?
A.
{∅, {1}}
B.
{1}
C.
{∅}
D.
{1, ∅}
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Solution
The power set of G = {1} is {∅, {1}}.
Correct Answer: A — {∅, {1}}
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Q. What is the power set of the set {1, 2}?
A.
{∅, {1}, {2}, {1, 2}}
B.
{∅, {1, 2}}
C.
{1, 2}
D.
{1, 2, ∅}
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Solution
The power set of a set with n elements has 2^n elements. For {1, 2}, the power set is {∅, {1}, {2}, {1, 2}}.
Correct Answer: A — {∅, {1}, {2}, {1, 2}}
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Q. What is the principal value of cot^(-1)(0)?
A.
0
B.
π/2
C.
π
D.
undefined
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Solution
cot^(-1)(0) = π/2
Correct Answer: B — π/2
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Q. What is the principal value of sec^(-1)(2)?
A.
π/3
B.
π/4
C.
π/6
D.
0
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Solution
sec^(-1)(2) = π/3, since sec(π/3) = 2.
Correct Answer: A — π/3
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Q. What is the probability of drawing a red card from a standard deck of cards?
A.
1/2
B.
1/4
C.
1/3
D.
1/6
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Solution
There are 26 red cards in a deck of 52. Probability = 26/52 = 1/2.
Correct Answer: A — 1/2
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Q. What is the probability of drawing an ace from a standard deck of cards?
A.
1/52
B.
1/13
C.
1/26
D.
1/4
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Solution
There are 4 aces in a deck of 52 cards. Therefore, the probability P(ace) = 4/52 = 1/13.
Correct Answer: B — 1/13
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Q. What is the probability of getting a sum of 7 when two dice are rolled?
A.
1/6
B.
1/12
C.
1/36
D.
1/3
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Solution
The possible outcomes for a sum of 7 are (1,6), (2,5), (3,4), (4,3), (5,2), (6,1) which gives us 6 favorable outcomes. Total outcomes when rolling two dice = 6 * 6 = 36. Therefore, P(sum of 7) = 6/36 = 1/6.
Correct Answer: A — 1/6
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Q. What is the probability of rolling an even number on a fair six-sided die?
A.
1/6
B.
1/3
C.
1/2
D.
2/3
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Solution
Even numbers on a die: 2, 4, 6. Probability = 3/6 = 1/2.
Correct Answer: C — 1/2
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